To use the Reporting components in your WPF application that targets .NET Core 3, install the DevExpress.WindowsDesktop.Wpf NuGet package. It includes our reporting components. Note that .NET Core 3 is currently in preview state, so there may be a lot of changes both in our components and in .NET Core 3 itself when it is finally released.
Also, not all our components support .NET Core 3. Please check the Visual Studio 2019 and .NET Core 3 Support blog post for more information regarding this. There, you can also find links to our demo projects converted to .NET Core 3.